1. Warm-Up (9/14)
On the piece of white paper from the back, answer the following question.
People who recycle organic materials by composting know that green things which have been recently cut (such as grass clippings) are great sources of Nitrogen to add to their soil, while brown things which once were living but are now decomposing (such as dead leaves) are much more abundant in Carbon than Nitrogen. Why do dead things no longer contain an abundance of Nitrogen?
green things
brown things

2. The Fluid Mosaic Model
p. 127

3. The Fluid Mosaic Model
p. 127

4. Lipid embedded inside membrane
The Fluid Mosaic Model
p. 127
Lipid embedded inside membrane

5. The Fluid Mosaic Model p. 127 Lipid embedded inside membrane
Protein going through the membrane

6. The Fluid Mosaic Model p. 127 Protein on inside or outside surface
Lipid embedded inside membrane
Protein going through the membrane

7. The Fluid Mosaic Model p. 127 Protein with carbohydrate attachment
Protein on inside or outside surface
Lipid embedded inside membrane
Protein going through the membrane

8. The Fluid Mosaic Model p. 127 Protein with carbohydrate attachment
Lipid with carbohydrate attachment
Protein on inside or outside surface
Lipid embedded inside membrane
Protein going through the membrane

9. The Fluid Mosaic Model p. 127 Protein with carbohydrate attachment
Lipid with carbohydrate attachment
Protein on inside or outside surface
Lipid embedded inside membrane
Protein going through the membrane

10. The Fluid Mosaic Model
p. 127
What are the two parts of this lipid?

11. The Fluid Mosaic Model
p. 127
What are the two parts of this lipid?

12. The Fluid Mosaic Model p. 126
Nothing is preventing them from moving sideways (laterally), and they are!

13. What about the tail structure is causing this “kink”?
The Fluid Mosaic Model
p. 127
What about the tail structure is causing this “kink”?
a “kink”

14. The “kink” slightly promotes lateral movement
The Fluid Mosaic Model
p. 127
The “kink” slightly promotes lateral movement
a “kink”

15. Independent Practice p. 141 questions 2 and 3…
…and answer this question:
What kinds of amino acid side chains do you expect to be on the surface of a protein passing through the inside part of the bilayer? Why?

16. Surface Area
Which will cook faster?

17. Surface Area of a Cube Surface Area = s x s x 6 Volume = s x s x s
1 cm
1 cm
3 cm
1 cm
1 cm
1 cm
1 cm
3 cm
1 cm
3 cm
1 cm
1 cm

18. Microvilli of the Small Intestine

19. Microvilli of the Small IntestineB
Which cell has more surface area?
Which cell can absorb more nutrients?

20. Independent Practice

21. Closure (9/14)
Based on the phospholipid bilayer structure of cell membranes, explain how a cell is able to retain water.
Scale from 1-10